Abstract
Background: medicinal plants are abundant in phytochemicals, which represent the richest bioresource of drugs are used against various diseases.
 Objective: The present study included an in-vitro antimicrobial investigation for one of wild Iraqi plant Lepidium draba on some skin infectious agents. 
 Methods: The fresh aerial plant parts were macerated in 80% ethanol and subjected to phytochemical general test to investigate the plant active contents. Totat flavonoids were isolated through plant reflex in acidic aqeous solution to obtain the aglycone flavonoids using ethylacetate as an organic solvent. Qualification and quantification of the isolated total flavonoids were done in coressponding to standard s flavonoids. An antimicrobial activity for the crud ethanolic extract and the isolated total flavonoids had been carried out on some skin infectous agents using the following strain: Staph aureus, Pseudomoneus aerogenosa and Candida albicans.
 Results: the outcome showed that the plant contain major active constituent included flavonoids Tannins, polysaccharides, alkaloids,saponines and Polyphenolic compounds.The plant contains many types of flavonoids including Rutin, Qurecetin, Kampferol and Luteolin, and each 100 g fresh aerial parts will contain 28 mg total flavonoids. The amount of each type of flavonoids were detected by HPLC technique. the extracted flavonoids at concentation of 4mg/ml showed potent effect upon the gram bacteria negative pseudomonas aeruginosa which is known to be more virulence than the gram positive strains but has no effect on Staphylococcus aureus. Also the extracted flavonoids appeared to be affected against the Candida albicans growth. 
 Conclusion: the ethanolic extractv of locally plant L.draba is effecient to inhibit the growth of pathogenic bacteria and decrease the chances of skin infection that provided the justification for therapeutic potential as supplementary or alternative medicine.
Highlights
The use of higher plants and their extracts to treat infection is an old age practice in traditional medicine
Numerous plants and herbs are used all by traditional medicine practitioners
Because of the clinical efficacy of many presently used antibiotics is being threatened by the emergence of multidrug resistant (MDR) pathogens numerous herbal medicines reported in the traditional medicine and evaluated for efficacy and safety .No chemical substances can be found without having adverse (1)
Summary
The fresh aerial plant parts were macerated in 80% ethanol and subjected to phytochemical general test to investigate the plant active contents. An antimicrobial activity for the crud ethanolic extract and the isolated total flavonoids had been carried out on some skin infectous agents using the following strain: Staph aureus, Pseudomoneus aerogenosa and Candida albicans. Results: the outcome showed that the plant contain major active constituent included flavonoids Tannins, polysaccharides, alkaloids,saponines and Polyphenolic compounds.The plant contains many types of flavonoids including Rutin, Qurecetin, Kampferol and Luteolin, and each 100 g fresh aerial parts will contain 28 mg total flavonoids. Conclusion: the ethanolic extractv of locally plant L.draba is effecient to inhibit the growth of pathogenic bacteria and decrease the chances of skin infection that provided the justification for therapeutic potential as supplementary or alternative medicine
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